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HTML DOM Caption Object
The HTML DOM Caption object is associated with the HTML <caption> element. The <caption> element is used for setting caption (title) of the table and should be the first child of the table. You can access caption element using the caption object.
Properties
Note: The below property are not supported in the HTML5.
Following is the HTML DOM Caption Object property −
| Property | Description |
|---|---|
| Align | To set or return the caption alignment. |
Syntax
Following is the syntax for −
Creating a caption object −
var x = document.createElement("CAPTION");
Example
Let us see an example for the HTML DOM Caption object −
<!DOCTYPE html>
<html>
<head>
<style>
table, th, td {
border: 1px double black;
margin-top: 14px;
}
</style>
</head>
<body>
<p>Click the button below to create the caption for the table.</p>
<button onclick="createCaption()">CREATE</button>
<table id="SampleTable">
<tr>
<td colspan="2" rowpan="2">TABLE</td>
</tr>
<tr>
<td>Value 1</td>
<td>Value 2</td>
</tr>
</table>
<script>
function createCaption() {
var x = document.createElement("CAPTION");
var t = document.createTextNode("TABLE CAPTION");
x.appendChild(t);
var table = document.getElementById("SampleTable")
table.insertBefore(x, table.childNodes[0]);
}
</script>
</body>
</html>
Output
This will produce the following output −
On clicking the CREATE button −
In the above example −
We have first created a button CREATE to execute createCaption() method on click −
<button onclick="createCaption()">CREATE</button>
The createCaption() method creates a caption element using the createElement() method of the document object and assigned it to variable x. It then created a text node with “TABLE CAPTION” text. We then appended the text node to the element.
Finally, we get the <table> element using the id “SampleTable” and using the insertBefore() method inserted the caption along with the text node as the first child of the table. The <caption> can only be the first child of a table −
function createCaption() {
var x = document.createElement("CAPTION");
var t = document.createTextNode("TABLE CAPTION");
x.appendChild(t);
var table = document.getElementById("SampleTable")
table.insertBefore(x, table.childNodes[0]);
}
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